n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 4 |
4 | 25 |
5 | 208 |
6 | 2121 |
7 | 25828 |
8 | 365457 |
9 | 5895104 |
10 | 106794993 |
11 | 2147006948 |
12 | 47436635753 |
13 | 1142570789072 |
14 | 29797622256377 |
15 | 836527783016196 |
16 | 25153234375160993 |
17 | 806519154686509056 |
18 | 27470342073410272609 |
[1,0,1,4,25,208,2121,25828,365457,5895104, 106794993,2147006948,47436635753,1142570789072, 29797622256377,836527783016196,25153234375160993, 806519154686509056,27470342073410272609] |